Just south of San Diego, thousands of migrants from Central America are camped out near the U.S.-Mexico border, hoping to seek asylum in the United States. In the weeks since their arrival, there have been flashpoints such as a clash with authorities, a flooded, overcrowded shelter and a temporary border shutdown.

Photographers from The San Diego Union-Tribune are following along as the story develops. This is a selection of their best work.

Last update: Tuesday, Dec. 18 at 4:09 p.m. For more photo galleries and multimedia, visit our special section cataloging visual coverage of the migrant caravan.

Tuesday, Dec. 18

At the El Barretal shelter on Tuesday, Lesbia Nohemi Navaoro Duarte from Honduras held her three son Henry Josue. They will remain in Tijuana while older two teenage sons have decided to return back to Honduras. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Monday, Dec. 17

A group of about 15 Central American caravan members accompanied by lawyers and two members of Congress presented themselves at the Otay Mesa Port of Entry where the migrants asked for asylum. (John Gibbins/ The San Diego Union-Tribune)

Saturday, Dec. 15

Lucy Dominguez, front, holds a cross as she and others listen to the names of migrants who have died crossing the border in 2018 at Friendship Park during the 25th annual La Posada in San Diego on Saturday. (Hayne Palmour IV/ The San Diego Union-Tribune)

About 30 people attended the America First rally on the Camino de la Plaza Bridge over Interstate Highway 5 near the San Ysidro Port of Entry supporting President Donald Trump, his "America First" policy, and the building of the border wall. (Howard Lipin / The San Diego Union-Tribune)

Friday, Dec. 14

Mary Ann Mendoza embraces Kathy Hall at a press conference at the San Ysidro Port of Entry in San Diego, California. Mendoza and Hall are both so-called "Angel Mothers," meaning that one of their loved ones was a victim of crime or violence committed by an unauthorized immigrant. Members of the group railed against the caravan, calling it an "invasion." (Sam Hodgson / The San Diego Union-Tribune)

Two floors of a Zona Norte warehouse were cleaned out and will be the used as a new shelter for Central American migrants. It is located about a half block east of the shuttered Benito Juarez shelter. (John Gibbins / The San Diego Union-Tribune)

Thursday, Dec. 13

Lionel Estevan Perez, a 12-year-old migrant from Nicaragua, sits down on the concrete curb to eat a hot meal served by World Central Kitchen at the El Barretal shelter in Tijuana. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Tuesday, Dec. 11

A group of about 50 migrants marched to the U.S. Consulate in Tijuana to deliver a letter asking U.S. officials to speed up the asylum process. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Monday, Dec. 10

Agents enforced the federal property along the fence during a demonstration at Border Field State Park and began to push protestors back. More than 30 people who refused to back up were arrested. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Rev. Bonnie Tarwater from the Church for our Common Home takes part in the protest, which kicked off a week of demonstrations across the country with the message that "Love knows no borders." (Nelvin C. Cepeda / The San Diego Union-Tribune)

Thursday, Dec. 6

Making a little cash until he gets a work permit for Tijuana, Daniel Martinez of Honduras cuts the hair of Miguel Angel Rodriguez. Martinez, who brought his own gear with him, has been cutting hair since the caravan left, and charges 40 pesos (about $2) per customer. (Nelvin C. Cepeda/ The San Diego Union-Tribune)

Tuesday, Dec. 4

A group of men pass the time by playing the card game Conquian. (Sam Hodgson / The San Diego Union-Tribune)

A migrant looks out over El Barretal, a vacant nightclub in Mariano Matamoros that's serving as a shelter. (Sam Hodgson / The San Diego Union-Tribune)

Monday, Dec. 3

The new migrant shelter that recently opened in Mariano Matamoros is now home to approximately 2,300 migrants who have been relocated from the previous shelter at the Benito Juarez Sports Complex. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Sunday, Dec. 2

At the Casas YMCA in Tijuana, a boy traveling from Honduras wears a crucifix given to him by his parents for the journey with the migrant caravan traveling north. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Friday, Nov. 30

Blanca Aguilar, 43, from Honduras, holds two of her three children, Ceiby Yanilet Portillo, 2, and Alexia Nicol Rivera, 6, just after getting off a bus that brought them from the Benito Juarez sports complex shelter to the El Barretal shelter in Tijuana on Friday. (Hayne Palmour IV / The San Diego Union-Tribune)

Central American migrants, who were staying at the Benito Juarez sports complex shelter, are reflected in a mirror as they ride a bus to the newly set up El Barretal shelter eleven miles away in Tijuana on Friday. (Hayne Palmour IV / The San Diego Union-Tribune)

Thursday, Nov. 29

A Thursday rain storm left the temporary shelter flooded through with very few dry spots for the migrants from Central America who have traveled with the caravan and arrived in Tijuana, Mexico. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Tuesday, Nov. 27

After bathing at the open showers, Nelson Ruiz and his wife, Damari Alejandra Tajeda, walk back to their tent in wet clothes. The young couple from Honduras arrived in Tijuana with the Central American migrant caravan. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Sunday, Nov. 25

U.S. Border Patrol deploy CS gas on migrants refusing to step away from the concertina wire set up along the U.S.-Mexico border near San Ysidro. Agents said they had been hit with rocks. (Nelvin C. Cepeda/The San Diego Union-Tribune)

U.S. Border Patrol gives instructions to migrants near the U.S. Mexico border to step away. (Nelvin C. Cepeda / The San Diego Union-Tribune)

Migrants with the Central American caravan breach a line set up by the Mexico Federal Police, then try to access the San Ysidro Port of Entry. (Nelvin C. Cepeda/The San Diego Union-Tribune)

Thursday, Nov. 22

A young boy with the group of Central American migrants who marched from a shelter to the border to apply for asylum in the United States sits in front of a line of Mexican Federal Police officers as the officers prevent the migrants from getting any closer to the U.S.-Mexico border. (Hayne Palmour IV/The San Diego Union-Tribune)

Wednesday, Nov. 21

A woman and her daughter wait just outside the temporary shelter. (Nelvin C. Cepeda/The San Diego Union-Tribune)

Tuesday, Nov. 20

Secretary of Homeland Security Kirstjen Nielsen discusses border security and the migrant caravan in San Diego after briefly touring the border. (Sam Hodgson/The San Diego Union-Tribune)

U.S. Marines deployed to the U.S.-Mexico border in San Diego work to fortify the border wall with concertina wire at the Otay Mesa Port of Entry. Heightened security measures were taken in the wake of the arrival of groups with the Central American migrant caravan. (Nelvin C. Cepeda/The San Diego Union-Tribune)

Monday, Nov. 19

A temporary migrant shelter, open since late October, is helping migrant families with resources like food, water, shelter, legal services and transportation, since they were initially processed for asylum. (John Gastaldo for The San Diego Union-Tribune)

Sunday, Nov. 18

Protesters demonstrate at the Zone Rio near the monument of Cuauhtémoc. (Nelvin C. Cepeda/The San Diego Union-Tribune)

Saturday, Nov. 17

Marlon Valle looks in a broken mirror as a fellow Honduran cuts his hair at the shelter. (Hayne Palmour IV/The San Diego Union-Tribune)

Men and and boys shower at the outfield fence of a baseball field at the shelter. (Hayne Palmour IV/The San Diego Union-Tribune)

Migrants hold up their hands as they clamor for clothes being handed out by Trinity United Presbyterian Church while outside of the shelter. (Hayne Palmour IV/The San Diego Union-Tribune)

Friday, Nov. 16

People charge their phones at any electrical outlet they can find at the sports complex that has been converted to a migrant shelter. (Hayne Palmour IV/The San Diego Union-Tribune)

Thursday, Nov. 15

A worker on the U.S. side installed razor wire at the U.S.-Mexico border at Playas de Tijuana, Mexico. (Hayne Palmour IV/The San Diego Union-Tribune)

Baja California state officials get a tour of the temporary shelter set up for some of the migrants. (Nelvin C. Cepeda/The San Diego Union-Tribune)

Tuesday, Nov. 13

After the caravan arrived in Tijuana by bus and after a brief stop for a meal, some left to walk to Las Playas de Tijuana. On arrival to the U.S.-Mexico border, many decided to climb the fence with U.S. Border Patrol on the north side of the fence observing. (Nelvin C. Cepeda/The San Diego Union-Tribune)

A Central American migrant caravan arrived in Tijuana by bus and after a brief stop for a meal left walking for La Playa. One individual threw his arm up at the sight of seeing the U.S.-Mexico border shortly after the Central American migrant caravan arrived in Tijuana by bus. (Nelvin C. Cepeda/The San Diego Union-Tribune)